CN215672689U - Gear pump - Google Patents

Abstract

The utility model provides a gear pump, which relates to the field of pumps, and comprises: the pump body is divided into a first pump body and a second pump body, a main oil inlet and a main oil outlet are arranged on two opposite sides of the first pump body, the first pump body and the second pump body are communicated with an oil return outlet through an oil return inlet, the oil return inlet is communicated with the main oil outlet, and the oil return outlet is communicated with the main oil inlet; the driving gear is arranged inside the first pump body; the driven gear is arranged in the first pump body and is meshed with the driving gear; the overflow valve is inserted into the oil return channel, and the minimum clearance between the surface of the overflow valve and the inner wall of the oil return channel can be adjusted by adjusting the degree of inserting the overflow valve into the oil return channel, so that the oil pressure of the gear pump oil outlet is adjusted; through such setting, need not to connect other pressure regulating equipment on external pipeline to can realize pressure regulating structure and gear pump body production.

Description

Gear pump

Technical Field

The utility model relates to the field of pumps, in particular to a gear pump.

Background

The gear pump is a rotary pump that delivers or pressurizes oil by virtue of changes and movements in the displacement volume formed between a pump body and meshing gears. Two closed spaces are formed by the two gears, the pump body and the front cover and the rear cover, when the gears rotate, the volume of the space on the gear disengagement side is increased from small to large, vacuum is formed, oil is sucked, the volume of the space on the gear engagement side is decreased from large to small, and the oil is squeezed into the pipeline. The pressure of the oil pumped by the gear pump needs to be adjusted usually, and in the prior art, a common mode is to install a pressure adjusting valve on an external pipeline, but the mode is inconvenient and is inconvenient for the integrated production of products.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the utility model provides the gear pump, which can adjust the liquid outlet pressure of the gear pump without installing other equipment on an external pipeline and can realize integrated production of products.

An embodiment of a first aspect of the present invention provides a gear pump comprising: the pump comprises a first pump body, a second pump body and a third pump body, wherein a main oil inlet and a main oil outlet are formed in two opposite sides of the first pump body; the first pump body and the second pump body are communicated with an oil return outlet through an oil return inlet, an oil return channel is arranged in the second pump body, the oil return inlet and the oil return outlet are arranged at two ends of the oil return channel, the oil return inlet is communicated with the main oil outlet, and the oil return outlet is communicated with the main oil inlet; the driving gear is arranged inside the first pump body; a driven gear provided inside the first pump body, the driven gear being engaged with the drive gear and being capable of being driven to rotate by the drive gear; the overflow valve is inserted into the oil return channel, and the degree of the overflow valve inserted into the oil return channel can be adjusted to adjust the minimum clearance between the surface of the overflow valve and the inner wall of the oil return channel, so that the oil pressure of the gear pump is adjusted.

The gear pump provided by the embodiment of the utility model at least has the following technical effects:

in the gear pump, an overflow valve inserted in the second pump body is arranged to adjust the flow of oil in the second pump body so as to control the oil pressure output by the gear pump. Through such setting, need not to connect other pressure regulating equipment on external pipeline to can realize pressure regulating structure and gear pump body production.

According to some embodiments of the present invention, the driving shaft is disposed through the first pump body, one end of the driving shaft is exposed outside the first pump body, the other end of the driving shaft is inserted into the first pump body and connected to the driving gear, the other end of the driving shaft abuts against the second pump body, and the oil return inlet and the oil return outlet are disposed on two sides of the driving shaft respectively.

According to some embodiments of the present invention, the driving shaft further comprises an aluminum ring, and the aluminum ring is sleeved on the driving shaft.

According to some embodiments of the utility model, a connecting key is arranged at one end of the driving shaft, which is exposed out of the first pump body, and the connecting key is used for clamping and connecting external equipment.

According to some embodiments of the utility model, the first pump body is arranged separately from the second pump body and is connected by screws.

According to some embodiments of the present invention, the pump further includes a cover, the cover is disposed on a side of the first pump body away from the second pump body, the screw penetrates through the cover, the first pump body and the second pump body to fix the first pump body and the second pump body to each other, and the cover is provided with a first through hole for the driving shaft to pass through.

According to some embodiments of the present invention, the driving shaft further comprises an oil seal ring, the oil seal ring is sleeved on the driving shaft and located at a position close to the first through hole, and the oil seal ring is used for sealing the first through hole.

According to some embodiments of the utility model, the screw is a socket head cap screw.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The above and or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic structural view of a gear pump according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a gear pump (without the first pump body, the second pump body and the cover) according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view of a first pump body and a second pump body of a gear pump according to an embodiment of the present invention.

Reference numerals:

the oil seal structure comprises a driving shaft 100, a connecting key 110, an oil seal ring 120, a cover body 210, a first through hole 211, a first pump body 220, a main oil inlet 221, a main oil outlet 222, a second pump body 230, an oil return inlet 231, an oil return channel 232, an oil return outlet 233, a screw 240, a driving gear 300, a driven gear 400, an aluminum ring 500 and an overflow valve 600.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the positional or positional relationships referred to in the positional descriptions, such as up, down, front, rear, left, right, etc., are based on the positional or positional relationships shown in the drawings, which are merely for convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means is two or more, and greater than, less than, more than, etc. are understood as excluding the present number, and greater than, less than, etc. are understood as including the present number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless otherwise explicitly defined, terms such as arrangement, installation, connection and the like should be broadly construed, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the detailed contents of the technical solutions.

A gear pump according to an embodiment of the present invention is described below with reference to fig. 1 to 3.

Referring to fig. 1-3, the figures illustrate a gear pump of one embodiment of the present invention, comprising: the pump comprises a first pump body 220 and a second pump body 230, wherein a main oil inlet 221 and a main oil outlet 222 are arranged on two opposite sides of the first pump body 220, the first pump body 220 and the second pump body 230 are communicated with an oil return outlet 233 through an oil return inlet 231, an oil return channel 232 is arranged in the second pump body 230, the oil return inlet 231 and the oil return outlet 233 are arranged at two ends of the oil return channel 232, the oil return inlet 231 is communicated with the main oil outlet 222, and the oil return outlet 233 is communicated with the main oil inlet 221; a driving gear 300 disposed inside the first pump body 220; a driven gear 400 disposed inside the first pump body 220, the driven gear 400 being engaged with the driving gear 300 and being capable of being driven to rotate by the driving gear 300; the overflow valve 600 is inserted into the oil return channel 232, and the degree of the overflow valve 600 inserted into the oil return channel 232 can be adjusted to adjust the minimum clearance between the surface of the overflow valve and the inner wall of the oil return channel 232, so that the oil pressure of the gear pump is adjusted.

In the gear pump, a relief valve 600 inserted into the second pump body 230 is provided to adjust the flow rate of the oil inside the second pump body 230, so as to control the oil pressure output by the gear pump. Through such setting, need not to connect other pressure regulating equipment on external pipeline to can realize pressure regulating structure and gear pump body production.

Referring to fig. 3, when the gear pump is in operation, an oil path through which oil passes is divided into a main oil path and an oil return path. The main oil flows from one side to the other side of the driving gear 300 and the driven gear 400, i.e. from the main oil inlet 221 to the main oil outlet 222; the oil return path flows into the oil return passage 232 through the oil return inlet 231 and then flows out through the oil return outlet 233. The flow rate of the oil in the second pump body 230 can be adjusted by adjusting the degree of inserting the overflow valve 600 into the oil return passage 232, that is, the deeper the overflow valve 600 is inserted, the smaller the minimum gap between the surface of the overflow valve and the inner wall of the oil return passage 232 is, so that the smaller the flow rate of the oil in the oil return passage 232 is (the smaller the flow rate of the oil return passage is), the larger the pressure of the oil discharged from the main oil outlet 222 is. Through such an arrangement, the oil pressure of the gear pump can be adjusted and controlled through the overflow valve 600.

Referring to fig. 2 and 3, it can be understood that the cross-sectional area of the relief valve 600, which is inserted into one end of the oil return passage 232 to the middle thereof, is gradually increased. Through such setting, overflow valve 600 inserts oil return passage 232 and inserts the deepening, and the minimum clearance between overflow valve 600 surface and the oil return passage 232 inner wall also is littleer to make this overflow valve 600 can adjust the flow of oil in oil return passage 232, and then adjust the oil pressure of producing oil of this gear pump. In some embodiments, in the relief valve 600, the relief valve 600 is inserted into one end of the oil return passage 232 to the middle thereof, and the surface of the relief valve 600 is a conical surface extending outward, that is, the outer wall of the relief valve 600 is at a greater distance from the axis thereof. Further, in other embodiments, referring to fig. 3, a stepped structure is provided on the overflow valve 600, so as to adjust the flow rate of the oil in the oil return passage 232 step by step.

Referring to fig. 1 and 2, it can be understood that the gear pump further includes a driving shaft 100, the driving shaft 100 is disposed through the first pump body 220, one end of the driving shaft 100 is exposed outside the first pump body 220, the other end of the driving shaft 100 is inserted into the first pump body 220 and connected to the driving gear 300, the other end of the driving shaft 100 abuts against the second pump body 230, and the oil return inlet 231 and the oil return outlet 233 are disposed on two sides of the driving shaft 100, respectively. The driving shaft 100 is provided to drive the driving gear 300 provided inside the first pump body 220 and the driven gear 400 engaged with the driving gear 300.

Referring to fig. 2, it can be understood that the gear pump further includes an aluminum ring 500, and the driving shaft 100 is sleeved with the aluminum ring 500. The aluminum ring 500 is provided to serve as a bearing for supporting the drive shaft 100 for rotation. Further, in some embodiments, the driven gear 400 is sleeved on a shaft, the driven shaft is also disposed inside the first pump body 220, and the driven shaft may also be sleeved with the aluminum ring 500 to achieve a similar effect.

Referring to fig. 1 and 2, it can be understood that a connection key 110 is disposed at an end of the driving shaft 100 exposed to the first pump body 220, and the connection key 110 is used for clamping an external device. Through setting up the connector key 110, be convenient for this gear pump and driving motor be connected. It will be appreciated that the shape of the connection key 110 is correspondingly configured according to the motor interface to which it is connected.

Referring to fig. 1 and 3, it can be understood that, in the first pump body 220 and the second pump body 230, a gear cavity for accommodating the driving gear 300 and the driven gear 400 is formed inside the first pump body 220, an oil return channel 232 for returning oil is formed inside the second pump body 230, and the first pump body 220 and the second pump body 230 are connected by a screw 240. Through the pump body split arrangement, in the gear pump, the gear part and the overflow valve 600 can be respectively installed in the first pump body 220 and the second pump body 230, and then the gear part and the overflow valve are assembled, so that the gear pump is convenient to use. Further, the first pump body 220 and the second pump body 230 may be disposed in mounting grooves of the driving gear 300, the driven gear 400, and the relief valve 600, so that each component is mounted in the first pump body 220 and the second pump body 230.

Referring to fig. 1, it can be understood that the gear pump further includes a cover 210, the cover 210 is disposed on a side of the first pump body 220 away from the second pump body 230, and the screws 240 pass through the cover 210, the first pump body 220 and the second pump body 230 to fix them together, and the cover 210 is provided with a first through hole 211 for the driving shaft 100 to pass through. The cover 210 with the first through hole 211 facilitates the insertion of the driving shaft 100 into the first pump body 220, and the cover 210, the first pump body 220 and the second pump body 230 are fixed by the screws 240, so that the three are fixed more tightly and are convenient to mount and dismount.

Referring to fig. 2, it can be understood that the gear pump further includes an oil seal ring 120, the oil seal ring 120 is sleeved on the driving shaft 100 and located at a position close to the first through hole 211, and the oil seal ring 120 is used for sealing the first through hole 211. By providing the oil seal ring 120 to seal the first through hole 211, problems such as oil leakage or gas leakage are prevented.

Referring to fig. 1, it can be appreciated that the screw 240 is a socket head cap screw 240. It is understood that the screw 240 pattern may be other types of screws 240 according to circumstances, and is not limited thereto.

Referring now to fig. 1-3, a gear pump according to an embodiment of the present invention is described in detail in one particular embodiment. It is to be understood that the following description is illustrative only and is not intended as a specific limitation on the utility model.

A gear pump, comprising: the pump comprises a first pump body 220 and a second pump body 230, wherein a main oil inlet 221 and a main oil outlet 222 are arranged on two opposite sides of the first pump body 220, the first pump body 220 and the second pump body 230 are communicated with an oil return outlet 233 through an oil return inlet 231, an oil return channel 232 is arranged in the second pump body 230, the oil return inlet 231 and the oil return outlet 233 are arranged at two ends of the oil return channel 232, the oil return inlet 231 is communicated with the main oil outlet 222, and the oil return outlet 233 is communicated with the main oil inlet 221; a driving gear 300 disposed inside the first pump body 220; a driven gear 400 disposed inside the first pump body 220, the driven gear 400 being engaged with the driving gear 300; the driving shaft 100 is inserted into the pump body, one end of the driving shaft 100 is exposed outside the pump body, the other end of the driving shaft 100 is inserted into the first pump body 220 and connected to the driving gear 300, the other end of the driving shaft 100 is abutted against the second pump body 230, and the oil return inlet 231 and the oil return outlet 233 are respectively arranged on two sides of the driving shaft 100; the overflow valve 600 is inserted into the oil return channel 232, and the degree of the overflow valve 600 inserted into the oil return channel 232 can be adjusted to adjust the minimum clearance between the surface of the overflow valve and the inner wall of the oil return channel 232, so that the oil pressure of the gear pump is adjusted. The gear pump further includes a cover 210, the cover 210 is disposed on a side of the first pump body 220 away from the second pump body 230, and the screws 240 pass through the cover 210, the first pump body 220 and the second pump body 230 to fix them together, and the cover 210 is provided with a first through hole 211 for the driving shaft 100 to pass through. The screw 240 is a socket head cap screw 240. The gear pump further comprises an oil seal ring 120, the driving shaft 100 is sleeved with the oil seal ring 120 and located at a position close to the first through hole 211, and the oil seal ring 120 is used for sealing the first through hole 211. The gear pump further comprises an aluminum ring 500, and the driving shaft 100 is sleeved with the aluminum ring 500. A connection key 110 is disposed at one end of the driving shaft 100 exposed out of the first pump body 220, and the connection key 110 is used for clamping external equipment.

By the gear pump according to the embodiment of the utility model, at least some technical effects as follows can be achieved: in the gear pump, a relief valve 600 inserted into the second pump body 230 is provided to adjust the flow rate of the oil inside the second pump body 230, so as to control the oil pressure output by the gear pump. Through such setting, need not to connect other pressure regulating equipment on external pipeline to can realize pressure regulating structure and gear pump body production.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: numerous changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the claims and the equivalents.

Claims (9)

1. Gear pump, its characterized in that includes:

the pump comprises a first pump body, a second pump body and a third pump body, wherein a main oil inlet and a main oil outlet are formed in two opposite sides of the first pump body;

the first pump body and the second pump body are communicated with an oil return outlet through an oil return inlet, an oil return channel is arranged in the second pump body, the oil return inlet and the oil return outlet are arranged at two ends of the oil return channel, the oil return inlet is communicated with the main oil outlet, and the oil return outlet is communicated with the main oil inlet;

the driving gear is arranged inside the first pump body;

the driven gear is arranged in the first pump body, is meshed with the driving gear and can be driven to rotate by the driving gear;

the overflow valve is inserted into the oil return channel, and the degree of the overflow valve inserted into the oil return channel can be adjusted to adjust the minimum clearance between the surface of the overflow valve and the inner wall of the oil return channel, so that the oil pressure of the gear pump is adjusted.

2. The gear pump of claim 1, wherein: and the cross section area from one end of the overflow valve inserted into the oil return channel to the middle part of the overflow valve is gradually increased.

3. The gear pump of claim 1, wherein: still include the drive shaft, the drive shaft wears to locate first pump body, its one end expose in first pump body outside, the other end insert first pump body is inside and be connected to the driving gear, and the other end of drive shaft with second pump body butt, the oil return import with the oil return export set up respectively in the drive shaft both sides.

4. The gear pump of claim 3, wherein: still include the aluminium circle, the aluminium circle cover is located the drive shaft.

5. Gear pump according to any of claims 3 to 4, characterized in that: and a connecting key is arranged at one end of the driving shaft exposed out of the first pump body and used for clamping external equipment.

6. The gear pump of claim 3, wherein: the first pump body and the second pump body are arranged in a split mode and are connected through screws.

7. The gear pump of claim 6, wherein: the cover body is arranged on one side, far away from the second pump body, of the first pump body, the screws penetrate through the cover body, the first pump body and the second pump body to be fixed with each other, and a first through hole is formed in the cover body to allow the driving shaft to penetrate through the cover body.

8. The gear pump of claim 7, wherein: still include the oil blanket ring, the oil blanket ring cover is located the drive shaft to be located near first fenestrate position, the oil blanket ring is used for sealing first perforation.

9. The gear pump of claim 7, wherein: the screw is a socket head cap screw.

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